Vise with antitilting means for the movable jaw



April 8, 1952 v. SPINNLER VISE WITH ANTITILTING MEANS yFOR THE MOVABLEJAW Filed Dec. 25, 1947 Patented Apr. 8, 1952 VISE WITH ANTITILTINGMEANS FOR THE MOVABLE JAW Viktor Spinnler, Basel, SwitzerlandApplication December 23, 1947, Serial No. 793,370 In Denmark February 8,1947 2 Claims.

The present invention relates to a vise with one xed and one movablejaw, the latter being arranged on a slide rail, which is displaceable ina guide in the fixed jaw and can be rmly clamped by tipping, the movablejaw being displaceable on the slide rail by means of an eccentric leverin order to press it against a workpiece.

The vise according to the invention is distinguished from known vises ofthe kind in that the counter-bearings of the slide rail, which take thecounter-pressure of the movable jaw and of the slide rail, are formed'byadjusting screws arranged in the guide of the fixed jaw, hardened andeach tted with a counter-nut, and that the guide rail consists ofunhardened iron.

The arrangement of hardened counter-bearings in connection with sliderails consisting of soft iron, makes possible instantaneous and certaintipping or clamping of the slide rail to the counter-bearings, which isnot always the case in known vises. Since the set screws serving ascounter-bearings are glass-hard, they. are practically not subject toany Wear. The set screws are conveniently accessible from outside andcan be easily regulated, so that the clamping jaws may be adjustedexactly to each other at any time. If the slide rail should in thecourse of time become worn through severe stressing, it can easily betaken out and overhauled, i. e.rflat tened at the surfaces whichcooperate with the set screws. By a simple readjustment of the setscrews the jaws may be again easily regulated, whereupon the vise ispractically again as good as new.

One form of embodiment of the object of the invention is illustrated byway of example in the drawing, in which:

Fig. 1 shows a side view of the vise mounted on a Work bench, with someparts in section,

Fig. 2 a top view of Fig. 1,

Fig. 3 a section taken on the line 3-3 in Fig. 1,

Fig. 4 a section taken on the line 4-4 in Fig. 1,

Figs. 5 and 6 show elevation and plan views, respectively, of Ianadjusting screw.

The illustrated vise has a fixed jaw I and a movable jaw 2. The fixedjaw I is fitted with a circular foot plate 3, from the underside ofwhich projects a centrally located vertical pivot pin 4, the pin 4 andbase 3 being relatively immovable. The pivot pin 4 is provided with athreaded extension 5 and with a square collar 6. The xed jaw I issupported with its foot plate 3 on a square plate 'I which is attachedby means of screws 8 to the work bench 9 and has a central square holeIII. The pivot pin 4 passes through this square hole, the square collar6 fitting into the square hole I0, thus preventing the foot plate 3 ofthe jaw I from rotating with respect to the square plate l. A xing nutII, provided with a lever I2, is screwed on to the threaded extension 5of the pivot pin 4. By tightening this xing nut, engagement of thesquare collar 6 with the square hole I0 is maintained. When the fixingnut is loosened and the vise is lifted, the square collar 6 can beraised out of the square hole I0. the vise turned through and againclamped in the new position in the manner described above.

Above the foot plate 3 the xed jaw I has a guide I3 of rectangularcross-section, in which a slide rail I4 is guided so that it can bedisplaced longitudinally. The slide rail I4 consists of two pieces 'ofat iron, parallel to each other, arranged at a distance from each otherand connected together by three cross pieces or webs I5. The crosspieces I5 are connected to one of the pieces of flat iron by welding andto the other piece of flat iron by a screw connection I6. Thecounter-pressure acting on the movable jaw 2 when clamping a workpiece,is taken on the one hand by two hardened set screws Il lying below thespaced at irons of the rail I4 and on the other hand by two set screwsI9 horizontally offset with respect to the screws I1. Thiscounter-pressure constitutes a moment about the bottom 'of the sliderail I4, which moment is counter-balanced by a moment comprised by theupward thrust on the set screws I9 by the axial distance between thepairs of set screws I1 and I9. The set screws I9 are positioned abovethe spaced flat irons and are also hardened. The set screws I'I and I9can be individually locked in vertically adjusted position by lock-nutsI8 and 20, respectively. Play for regulating the horizontal setting ofthe slide rails is provided by making the vertical inside dimension ofthe guide I3 greater than the depth of the rail I4. A stop in the formof a rib 2I is arranged on the inner surface of the guide I3. This stoplimits clockwise movement of the slide rail I4 and wobbling of thelatter, yet permits the slide to be tilted upwardly a slight amount sothat the movabe jaw and slide can be easily shifed by hand either towardor away from the fixed jaw.

At the front end of the slide rail I4 the movable jaw 2 is guided forlimited sliding movement by means of a close-fitting guide 22. A leafspring 24 is xed by means of a bolt 25 to a lug 23, which is attached tothe underside of said guide. The leaf spring is positioned between theflat irons of the slide rail I 4 and bears against the front cross pieceI5 in such a way that it biases the movable jaw away from the fixed jawI and against an eccentric 26, which is pivotably supported between thefront end of the irons. The axle 21 of the eccentric is supported insuitable holes drilled in the at-iron ends, and is secured by nuts 28screwed on to the ends of the axle projecting beyond the flat irons. Theeccentric 26 situated on the axle 2'I between the Iiat irons has a stoppiece 29 for limiting the position of the eccentric when loose, and hasa lever 30 for operating the eccentric.

For clamping any desired workpiece the clamping lever 30 is taken holdof by on'e hand and the slide rail is pulled out far `enough to allowthe workpiece to be easily inserted between the jaws I, 2. Then thedistance between the jaws is diminished by pushing the slide rail inuntil the jaws come to rest against the workpiece, after which, byswivelling the clamping lever 30 downwards, the workpiece is clampedfast, in doing which the slide rails I4 are clamped between the pairs ofset screws II and I9, and are, through the friction thus produced by theclamping pressure against the screws I'I, I9, held fast, and so securedagainst axial displacement.

'As can be seen from Figs. 5 and 6, one end of each set screw isprovided with an axial recess I'Ia which contacts the slide rail. Theouter diameter of this recess is somewhat smaller than the core diameterof the screw, so that an annular shoulder I'Ib is `formed. This annularshoulder represents only a, comparatively small surface, so that whenthe clamping lever 30 is operated, a large specific pressure is exertedby the slide vrails I4 on the annular surfaces I'Ib to 'ensure immediatefrictional connection between the 'setscrews and the slide rail.

What I claim is:

1. In a vise, a guide having an elongated aperture therethrough, a fixedjaw on said guide, a slide movably mounted in the elongated aperture insaid guide, a movable jaw slidably mounted on s'aid slide in opposedrelationship to the xed jaw, a lever pivoted on said slide, an eccentricformed on the lever and in operative engagement with the movable jaw,and anti-tilting means comprised by at least two set screws positionedin alignment transversely of the aper- 6 ture in the guide and extendingupwardly through the bottom of the latter adjacent the end facing themovable jaw and contacting the bottom of the slide, at least two otherset screws also positioned in alignment transversely of the aperture inthe guide, said other set screws extending downwardly through the top ofthe guide and being horizontally displaced from the rst set screws in adirection away from the movable jaw, and contacting the top ofthe slide,whereby tilting movement of said slide and movable jaw away from the xedjaw is prevented during work clamping movement of said lever, and atransversely positioned guide rib formed on the bottom of the apertureand guide adjacent the end which is opposite the end facing the movablejaw so as to li'rnt a reverse tilting movement when said movable jaw andslide are being manually shifted either toward or away from the xed jaw.

2. In a vise as dened in and by claim 1, and said slide being comprisedin part by a pair of spaced apart parallel rails movable through theaperture in the guide, said rst mentioned set screws constituting a pairof set screws in transverse alignment with respect to the axis of theaperture in the guide extending upwardly through the bottom of thelatter and respectively contacting the bottom of the rails of the slide,and said second mentioned screws constituting a pair of transverselyaligned set screws extending downwardly through the top of the guide,horizontally displaced from the rst pair of set screws and respectivelycontacting the top of the rails of theslide. 4 y

VIKTOR SPINNLER.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 669,605 Vernon Mar. 12, 1901851,491 Broadbooks Apr. 23, A1'90'7 v1,324,269 Placek Dec. 9, 19191,806,527 Eisemann May 1,9, '1931 1,992,165 Bardon Feb. 26, 1935 FOREIGNPATENTS Number Country 'D'ate 18,071 Great Britain Sept. 22, 1894102,033 Germany Apr. 7-, 1899 594,263 France 1 June 15, 1925 470,125Great Britain Aug. l0, V1937

